MedicalTerminology DB

Meaning of PI3K: A type of enzyme that transmits signals in cells and that helps control cell growth.

Definition of PI3K

A type of enzyme that transmits signals in cells and that helps control cell growth. Some tumors have higher-than-normal levels of PI3K. Also called phosphatidylinositol-3 kinase and PI3 kinase.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.